A method for testing the compressive strength of concrete using a torque method testing device

Abstract

The invention relates to the field of detection of concrete compression strength, and particularly discloses a device for detecting concrete compression strength by a torque method. The device comprises a base which is fixed on a to-be-tested concrete member through an expansion bolt, a guide post which is vertically arranged at one end of the base, and a lifting gear arranged on the guide post, wherein the lifting gear is connected with a beam, and controls the beam to move up and down; a motor is fixed at one end, far away from the lifting gear, of the beam; a rotating shaft of the motor is toward the to-be-tested concrete member; a hollow boring bit is coaxially arranged at the end part of the rotating shaft; and a torque sensor is arranged on the rotating shaft. By adopting the device for detecting the concrete compression strength by the torque method disclosed by the invention, a plurality of adverse impact factors in the prior art are avoided, the test cycle is shortened, the test accuracy is improved, only an annular gap which is 3-4cm deep is formed by the tested concrete member in practical application, and the core does not need to be taken out.

Description

technical field [0001] The invention relates to the detection field of concrete compressive strength, in particular to a method for realizing the detection of concrete compressive strength by using a torque method testing device. Background technique [0002] At present, there are many testing methods for the compressive strength of concrete in my country. Article 4.3.1 of the current national "Technical Standards for Building Structure Testing" GB50344 / T-2004 stipulates that the testing of concrete compressive strength of structures or components can use rebound method, ultrasonic rebound comprehensive method, after-installation pull-out method or core drilling method, etc., the detection operation shall comply with the provisions of the corresponding technical regulations. Among them, the first three detection methods are indirect methods, while the core drilling method is a direct method for directly measuring the compressive strength. [0003] The rebound method is a met...

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that drilling cores requires special tools and a long time, and the coring operation often damages the stressed steel bars and causes irreparable damage to the structure. Therefore, the number of core samples is limited, and the laboratory needs to cut the cores after coring. Repair and maintenance, and then can be tested, the test period is long, and the test cost is high

[0008] To sum up, the existing testing methods for compressive strength of concrete have different testing principles, different testing locations, differences in materials, construction techniques, construction quality, and various influencing factors between regions, and the use of testing personnel's instruments and methods. There are many factors such as different field operation normative control, and the test results are often quite different

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